Grain boundary cracking

A chronological summary is given of the various types of grain boundary fracture found in metals. In each case, there is an impurity that adsorbs at the new (fracture) surface being formed. For the case of Fe-P alloys, a quantitative argument can show that adsorption of phosphorous on the free surface greatly reduces the barrier to void nucleation compared to that in the absence of phosphorous. The same or larger reduction would appear for any other element, which adsorbs more strongly than phosphorous and displaces it at the surface. Such an argument is shown to explain a great many cases of dimpled grain boundary fracture in strong alloys undergoing creep or hydrogen attack. The reduction in surface energy can also lead to a smooth grain boundary fracture (no void nucleation), in which diffusion of solute to the new surface limits crack growth. Numerous examples of this are also discussed. Dr. Shewmon studied metallurgical engineering at the University of Illinois (B.S. 1952) and Carnegie Institute of Technology (Ph.D. 1955). His first job was at the Westinghouse Research Laboratory, where he studied thermal diffusion in alloys and surface diffusion. In 1958, he moved to the Carnegie Institute of Technology, where he served as a professor until 1967. The text “Diffusion in Solids” was published in 1963. An NSF Fellowship was used to study at Professor C. Wagner’s Max Planck Institute (Goettingen, Germany) in 1963. From 1968 to 1973, he was at Argonne National Laboratory, serving successively as Associate Director of the Metallurgy Division, Associate Director of the EBR-2 Project, and Director of the Materials Science Division. The text “Transformations in Metals” was published in 1969. Materials behavior in fast breeder reactors was the main theme of his work during this period. He was the director of the Division of Materials Research at the National Science Foundation from 1973 to 1975. From 1975 to 1993, he was Professor at Ohio State University in the Department of Metallurgical Engineering (later Materials Science and Engineering), serving as Chairman from 1975 to 1983. Research interests during this period were hard particle erosion and hydrogen-induced cracking of steel (“hydrogen attack”). From 1977 to 1993 he served on the Advisory Committee on Reactor Safety for the United States Nuclear Regulations Committee, serving as Chair for three of those years. Dr. Shewmon was elected to the National Academy of Engineering in 1979 and has been awarded the standing of Fellow in TMS, ASM, ANS, and AAAS. He has received several outstanding paper awards (Noble-AIME, Raymond—TMS, Mathewson—TMS, and Howe—ASM). He received the Distinguished Alumnus Award of the University of Illinois in 1981 and a Humboldt Foundation Senior Scientist Prize in 1984. The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering. The Institute of Metals Lecture was established in 1921, at which time the Institute of Metals Division was the only professional division within the American Institute of Mining and Metallurgical Engineers. It has been given annually since 1922 by distinguished people from this country and abroad. Beginning in 1973 and thereafter, the person selected to deliver the lecture will be known as the “Institute of Metals Division Lecturer and R.F. Mehl Medalist” for that year.     

The changing scene in steel

In the past thirty years the United States has moved from a position where it dominated world steel production to where it is now only one of the major world steel producers. The interplay of technology, economics and world politics which has brought this about will be reviewed, with particular emphasis on important technological changes which have occurred in the last three decades. To illustrate how research, development and application interacted to bring about change, specific examples will be given in ore reduction, continuous casting and high-strength steel products. The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering. H. W. PAXTON is Vice President-Research of the United States Steel Corporation. He received a B.Sc. and M.Sc. in 1947 and 1948 from the University of Manchester and his Ph.D. in 1952 from the University of Birmingham. In 1953 he became Assistant Professor of Metallurgical Engineering at Carnegie Institute of Technology, subsequently Carnegie-Mellon University, and became Head of the Department of Metallurgy and Materials Science and Director of the Metals Research Laboratory of Carnegie-Mellon in 1966. He was Visiting Professor in Metallurgy and Materials Science at Imperial College, London, in 1962–63 and at the Massachusetts Institute of Technology in 1970, and served two years as the first Director, Division of Materials Research, National Science Foundation 1971–1973. He was a consultant to industry from 1953 to 1974 and has authored many technical papers, primarily in the field of physical metallurgy. He also co-authored a book,Alloying Elements in Steel, with the late Dr. E. C. Bain. Dr. Paxton received the Bradley Stoughton Award for young teachers of metallurgy in 1960. He is a member of the American Association for the Advancement of Science, Directors of Industrial Research, and the Industrial Research Institute; Fellow of the American Society for Metals and The Metallurgical Society of AIME; Past President of TMS; Vice President of the American Institute of Mining Metallurgical, and Petroleum Engineers; Past Chairman of the General Research committee of the American Iron and Steel Institute, and was elected to membership of the National Academy of Engineering on April 3, 1978.     

Computer simulation of solidification processes—The evolution of a technology

The historical development of solidification modeling is traced, as applied to solidification processing. Clearly, the growth of this technology followed the computer explosion, particularly with regard to hardware. However, universities and government laboratories made substantial contributions in the software area, particularly in removing roadblocks to the further development of the technology and by creative examples. The commercial software houses have utilized these leading-edge developments, a practice continued and expanding today. Heat-transfer analyses by computer were initiated by utilizing the analog computer, which appeared to be a competing technology, but by the early 1960s, the digital computer had become the winner in larger-scale computation. A number of benchmark achievements followed over the next several decades. The evolution of this technology is documented, including predictions of solidification microstructure and resulting material properties. Future developments are projected. This lecture was presented to honor Edward DeMille Campbell (University of Michigan, Class of 1886), born in 1863, who was appointed Assistant Professor of Metallurgy in 1890. Dr. Campbell brought a strong interest in the study of the constitution of metals and alloys to the University of Michigan. In 1892, during a study of the composition of steel, he lost his eyesight in a laboratory explosion. Within five days, he returned to the University, and resumed his teaching and research. Over the next 30 years, he published 72 research papers, and developed a laboratory course in metallography. In 1924, working under the direction of Professor Campbell, William Fink discovered a new, tetragonal form of iron (martensite) in the first significant application of a new tool, X-ray diffraction, to physical metallurgy. It was these experiments that established the beginning of a strong tradition in physical metallurgy at the University of Michigan. In 1898, Campbell led the effort to establish Chemical Engineering at Michigan, becoming Professor of Chemical Engineering and Analytical Chemistry in 1902. In 1914, Campbell was appointed Director of the University’s Chemical Laboratory and Professor of Chemistry. Following his death in 1925, the American Society for Metals established this annual award in his name. The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering. Robert D. Pehlke studied at the University of Michigan, B.S.E. (Met. Eng.) 1955, Massachusetts Institute of Technology, S.M. (Met.) 1958, and Sc.D. (Met.) 1960, and at the Technical Institute, Aachen, as a Fulbright Fellow, 1956–57. He joined the faculty of the University of Michigan as Assistant Professor in February 1960, and was appointed Associate Professor in June 1963 and full Professor in June 1968. In May 1973, he was named Chairman of the Department of Materials and Metallurgical Engineering. In June 1978 and 1983, he was reappointed Department Chairman and served until June 1984. In 1994, he was Visiting Professor at Tohoku University (Sendai, Japan). He is a member of AIME and ASM, and has served on numerous divisional and award committees within these societies. He has served on the Technical Divisions Board (1982–84), as Secretary of the ASM Academy for Metals and Materials Committee, and in 1976 was named a Fellow of the Society. In 1964, he co-edited the ASM seminar volume on Computers in Metallurgy. He has served as Chairman of the Process Technology Division and as a Director of the ISS-AIME. In 1980, he was named a Distinguished Life Member of the ISS. In 1976, he received the Science Award Gold Medal of the Extractive Metallurgy Division of TMS-AIME. In 1983, he was named a Fellow of TMS. He was chairman of the former AIME-ISS Division Publications Committee. He served as chairman of the Editorial Board for the AIME Monograph Series on Oxygen Steelmaking. In 1980, he presented the Howe Memorial Lecture on “Steelmaking—The Jet Age.” In 1991–92, he was the Krumb Lecturer of the Metallurgical Society. In 1980, he was named a Case Institute Centennial Scholar and the Van Horn Distinguished Lecturer at Case Western Reserve University. He has lectured widely internationally, and at technical conferences, universities, corporations, and technical society chapters, including presenting a number of keynote, invited, and honorary lectures. He was National President of Alpha Sigma Mu and a member of Tau Beta Pi, Sigma Xi, and the New York Academy of Sciences. He is also a member of the American Society for Engineering Education and the American Foundry Society. He has held memberships in the Iron and Steel Institute of London, the Iron and Steel Institute of Japan, and the Verein Deutscher Eisenhuttenleute. He is a registered professional engineer in the State of Michigan. Dr. Pehlke has served as Foundry Educational Foundation Professor at The University of Michigan for 17 years. Professor Pehlke has authored or co-authored over 300 publications, including editing, authoring, or co-authoring 11 books. His text Unit Processes of Extractive Metallurgy has been widely used throughout the world. He co-authored Continuous Casting—Design and Operations, which is Volume 4 of the ISS-AIME series. He has won seven American Foundry Society Best Paper awards. In 1963, Dr. Pehlke published an ASM pioneering paper first describing computer modeling of continuous casting of steel. In 1964, he continued this work in conjunction with McLouth Steel Corporation, which had just installed the first slab casting machine for steel in the United States. In 1968, he, with the support of the Heat Transfer Committee of the American Foundry Society, initiated the first university research program in North America on computer modeling of the solidification of shaped castings. His early professional employment included three summers each with General Motors Research Laboratories and the Ford Scientific Laboratory. He has consulted extensively on a wide range of metallurgical subjects, principally with ferrous and nonferrous metal producers and their suppliers. His research has covered a broad range of metallurgical topics with an emphasis on high-temperature physical chemistry of metallurgical systems, modeling of solidification of metals, and computer applications in metallurgy.     

Computer simulation of solidification processes—The evolution of a technology

The historical development of solidification modeling is traced, as applied to solidification processing. Clearly, the growth of this technology followed the computer explosion, particularly with regard to hardware. However, universities and government laboratories made substantial contributions in the software area, particularly in removing roadblocks to the further development of the technology and by creative examples. The commercial software houses have utilized these leading-edge developments, a practice continued and expanding today. Heat-transfer analyses by computer were initiated by utilizing the analog computer, which appeared to be a competing technology, but by the early 1960s, the digital computer had become the winner in larger-scale computation. A number of benchmark achievements followed over the next several decades. The evolution of this technology is documented, including predictions of solidification microstructure and resulting material properties. Future developments are projected. This lecture was presented to honor Edward DeMille Campbell (University of Michigan, Class of 1886), born in 1863, who was appointed Assistant Professor of Metallurgy in 1890. Dr. Campbell brought a strong interest in the study of the constitution of metals and alloys to the University of Michigan. In 1892, during a study of the composition of steel, he lost his eyesight in a laboratory explosion. Within five days, he returned to the University, and resumed his teaching and research. Over the next 30 years, he published 72 research papers, and developed a laboratory course in metallography. In 1924, working under the direction of Professor Campbell, William Fink discovered a new, tetragonal form of iron (martensite) in the first significant application of a new tool, X-ray diffraction, to physical metallurgy. It was these experiments that established the beginning of a strong tradition in physical metallurgy at the University of Michigan. In 1898, Campbell led the effort to establish Chemical Engineering at Michigan, becoming Professor of Chemical Engineering and Analytical Chemistry in 1902. In 1914, Campbell was appointed Director of the University’s Chemical Laboratory and Professor of Chemistry. Following his death in 1925, the American Society for Metals established this annual award in his name. The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering. Robert D. Pehlke studied at the University of Michigan, B.S.E. (Met. Eng.) 1955, Massachusetts Institute of Technology, S.M. (Met.) 1958, and Sc.D. (Met.) 1960, and at the Technical Institute, Aachen, as a Fulbright Fellow, 1956–57. He joined the faculty of the University of Michigan as Assistant Professor in February 1960, and was appointed Associate Professor in June 1963 and full Professor in June 1968. In May 1973, he was named Chairman of the Department of Materials and Metallurgical Engineering. In June 1978 and 1983, he was reappointed Department Chairman and served until June 1984. In 1994, he was Visiting Professor at Tohoku University (Sendai, Japan). He is a member of AIME and ASM, and has served on numerous divisional and award committees within these societies. He has served on the Technical Divisions Board (1982–84), as Secretary of the ASM Academy for Metals and Materials Committee, and in 1976 was named a Fellow of the Society. In 1964, he co-edited the ASM seminar volume on Computers in Metallurgy. He has served as Chairman of the Process Technology Division and as a Director of the ISS-AIME. In 1980, he was named a Distinguished Life Member of the ISS. In 1976, he received the Science Award Gold Medal of the Extractive Metallurgy Division of TMS-AIME. In 1983, he was named a Fellow of TMS. He was chairman of the former AIME-ISS Division Publications Committee. He served as chairman of the Editorial Board for the AIME Monograph Series on Oxygen Steelmaking. In 1980, he presented the Howe Memorial Lecture on “Steelmaking—The Jet Age.” In 1991–92, he was the Krumb Lecturer of the Metallurgical Society. In 1980, he was named a Case Institute Centennial Scholar and the Van Horn Distinguished Lecturer at Case Western Reserve University. He has lectured widely internationally, and at technical conferences, universities, corporations, and technical society chapters, including presenting a number of keynote, invited, and honorary lectures. He was National President of Alpha Sigma Mu and a member of Tau Beta Pi, Sigma Xi, and the New York Academy of Sciences. He is also a member of the American Society for Engineering Education and the American Foundry Society. He has held memberships in the Iron and Steel Institute of London, the Iron and Steel Institute of Japan, and the Verein Deutscher Eisenhuttenleute. He is a registered professional engineer in the State of Michigan. Dr. Pehlke has served as Foundry Educational Foundation Professor at The University of Michigan for 17 years. Professor Pehlke has authored or co-authored over 300 publications, including editing, authoring, or co-authoring 11 books. His text Unit Processes of Extractive Metallurgy has been widely used throughout the world. He co-authored Continuous Casting—Design and Operations, which is Volume 4 of the ISS-AIME series. He has won seven American Foundry Society Best Paper awards. In 1963, Dr. Pehlke published an ASM pioneering paper first describing computer modeling of continuous casting of steel. In 1964, he continued this work in conjunction with McLouth Steel Corporation, which had just installed the first slab casting machine for steel in the United States. In 1968, he, with the support of the Heat Transfer Committee of the American Foundry Society, initiated the first university research program in North America on computer modeling of the solidification of shaped castings. His early professional employment included three summers each with General Motors Research Laboratories and the Ford Scientific Laboratory. He has consulted extensively on a wide range of metallurgical subjects, principally with ferrous and nonferrous metal producers and their suppliers. His research has covered a broad range of metallurgical topics with an emphasis on high-temperature physical chemistry of metallurgical systems, modeling of solidification of metals, and computer applications in metallurgy.     

Why materials science and engineering is good for metallurgy

Metallurgy/materials education will continue to evolve to encompass, in an intellectually unified way, the full range of structural and functional materials. Computation, information, and other advanced sciences and technologies will assume increasing roles in materials education, as will distance and continuing education. The advantages of the changes will be many … to the graduates, to emerging industries, and to the traditional metallurgical industries seeking productive, creative young engineers as employees. The need for continuing change in our metallurgy/materials departments is now no less if we are to attract the best young people into our field in the numbers needed and to best serve the needs of industry. Merton C. Flemings received his S.B. degree from MIT in the Department of Metallurgy in 1951. He received his S.M. and Sc.D. degrees, also in Metallurgy, in 1952 and 1954, respectively. From 1954 to 1956, he was employed as Metallurgist at Abex Corporation (Mahwah, NJ), and in 1956 returned to MIT as Assistant Professor. He was appointed Associate Professor in 1961 and Professor in 1969. In 1970, he was appointed Abex Professor of Metallurgy. In 1975, he became Ford Professor of Engineering, and, in 1981, Toyota Professor of Materials Processing. He established and was the first director of the Materials Processing. He established and was the first director of the Materials Processing Center at MIT in 1979. He served as Head, Department of Materials Science and Engineering, from 1982 to 1995 and thereafter returned to full-time teaching and research as Toyota Professor. He was Visiting Professor at Cambridge University in 1971, Tokyo University in 1986, and Ecole des Mines in 1996. In 1999, he was appointed Co-Director of the Singapore-MIT Alliance, a major distance educational and research collaboration among MIT and two Singaporean universities. Professor Flemings’ research and teaching concentrate on engineering fundamentals of materials processing and on innovation of materials processing operations. He is active nationally and internationally in strengthening the field of Materials Science and Engineering and in delineation of new directions for the field. He is a member of the National Academy of Engineering and of the American Academy of Arts and Sciences. He is author or co-author of 300 papers, 26 patents, and 2 books in the fields of solidification science and engineering, foundry technology, and materials processing. He has worked closely with industry and industrial problems throughout his professional career and currently serves on a number of corporate and technical advisory boards. He received the Simpson Gold Medal from the American Foundrymen’s Society in 1961, the Mathewson Gold Medal of TMS in 1969, and the Henry Marion Howe Medal of ASM International in 1973 and became a Fellow, ASM International, in 1976. In 1977, he was awarded the Henri Sainte-Claire Deville Medal by the Societe Francaise de Metallurgie. In October 1978, he received the Albert Sauveur Achievement Award from ASM INTERNATIONAL. In 1980, he received the John Chipman Award from AIME. In 1984, he was elected an honorary member of the Japan Foundrymen’s Society and, in 1985, received the James Douglas Gold Medal from the AIME. The Italian Metallurgical Association awarded him the Luigi Losana Gold Medal in 1986, and he was elected honorary member of The Japan Iron and Steel Institute in 1987. He was elected a TMS Fellow in 1989. In 1990, he received the TMS Leadership Award, and the Henry Marion Howe Medal and delivered the Edward DeMille Campbell Memorial Lecture of ASM INTERNATIONAL. In 1991, he received the Merton C. Flemings Award from Worcester Polytechnic Institute. Sigma Alpha Mu elected him a Distinguished Life Member in 1992. In 1993, he received the TMS 1993 Bruce Chalmers Award and was elected Councillor of the Materials Research Society. He was elected to the ASM INTERNATIONAL Board of Trustees in 1994. He received the Acta Metallurgica J. Herbert Holloman Award in 1997 for “contributions to materials technology that have had major impact on society.” Also in 1997 he was appointed David Turnbull Lecturer of the Materials Research Society for “outstanding contributions to understanding materials phenomena and properties.” He received the Educator Award of TMS in 1999, received the FMS (Federation of Materials Societies) National Materials Advancement Award in late 1999, and delivered the ASM and TMS Distinguished Lecture in Materials and Society in 2000.     

Why materials science and engineering is good for metallurgy

Metallurgy/materials education will continue to evolve to encompass, in an intellectually unified way, the full range of structural and functional materials. Computation, information, and other advanced sciences and technologies will assume increasing roles in materials education, as will distance and continuing education. The advantages of the changes will be many ... to the graduates, to emerging industries, and to the traditional metallurgical industries seeking productive, creative young engineers as employees. The need for continuing change in our metallurgy/materials departments is now no less if we are to attract the best young people into our field in the numbers and to best serve the needs of industry. Merton C. Flemings received his S.B. degree from MIT in the Department of Metallurgy in 1951. He received his S.M. and Sc.D. degrees, also in Metallurgy, in 1952 and 1954, respectively. From 1954 to 1956, he was employed as Metallurgist at Abex Corporation (Mahwah, NJ), and in 1956 returned to MIT as Assistant Professor. He was appointed Associate Professor in 1961 and Professor in 1969. In 1970, he was appointed Abex Professor of Metallurgy. In 1975, he became Ford Professor of Engineering, and, in 1981, Toyota Professor of Materials Processing. He established and was the first director of the Materials Processing Center at MIT in 1979. He served as Head, Department of Materials Science and Engineering, from 1982 to 1995 and thereafter returned to full-time teaching and research as Toyota Professor. He was Visiting Professor at Cambridge University in 1971, Tokyo University in 1986, and Ecole des Mines in 1996. In 1999, he was appointed Co-Director of the Singapore-MIT Alliance, a major distance educational and research collaboration among MIT and two Singaporean universities. Professor Flemings’ research and teaching concentrate on engineering fundamentals of materials processing and on innovation of materials processing operations. He is active nationally and internationally in strengthening the field of Materials Science and Engineering and in delineation of new directions for the field. He is a member of the National Academy of Engineering and of the American Academy of Arts and Sciences. He is author or co-author of 300 papers, 26 patents, and 2 books in the fields of solidification science and engineering, foundry technology, and materials processing. He has worked closely with industry and industrial problems throughout his professional career and currently serves on a number of corporate and technical advisory boards. He received the Simpson Gold Medal from the American Foundrymen’s Society in 1961, the Mathewson Gold Medal of TMS in 1969, and the Henry Marion Howe Medal of ASM International in 1973 and became a Fellow, ASM International, in 1976. In 1977, he was awarded the Henri Sainte-Claire Deville Medal by the Societe Francaise de Metallurgie. In October 1978, he received the Albert Sauveur Achievement Award from ASM INTERNATIONAL. In 1980, he received the John Chipman Award from AIME. In 1984, he was elected an honorary member of the Japan Foundrymen’s Society and, in 1985, received the James Douglas Gold Medal from the AIME. The Italian Metallurgical Association awarded him the Luigi Losana Gold Medal in 1986, and he was elected honorary member of The Japan Iron and Steel Institute in 1987. He was elected a TMS Fellow in 1989. In 1990, he received the TMS Leadership Award, and the Henry Marion Howe Medal and delivered the Edward DeMille Campbell Memorial Lecture of ASM INTERNATIONAL. In 1991, he received the Merton C. Flemings Award from Worcester Polytechnic Institute. Sigma Alpha Mu elected him a Distinguished Life Member in 1992. In 1993, he received the TMS 1993 Bruce Chalmers Award and was elected Councillor of the Materials Research Society. He was elected to the ASM INTERNATIONAL Board of Trustees in 1994. He received the Acta Metallurgica J. Herbert Holloman Award in 1997 for “contributions to materials technology that have had major impact on society.” Also in 1997 he was appointed David Turnbull Lecturer of the Materials Research Society for “outstanding contributions to understanding materials phenomena and properties.” He received the Educator Award of TMS in 1999, received the FMS (Federation of Materials Societies) National Materials Advancement Award in late 1999, and delivered the ASM and TMS Distinguished Lecture in Materials and Society in 2000.     

The challenge of quality in continuous casting processes

As in any process, the laws of nature are at work in the continuous casting of metals. Heat spills down temperature gradients under the watchful eye of Fourier, while molten metal moves in response to inertial and body forces governed by the Navier-Stokes equations. Tensile strains develop in the solidifying shell subject to changing cooling conditions, the constitutive behavior of the metal, compatibility, and the Prandtl-Reuss relations. Solutes segregate as thermodynamics compete with diffusion to create a heterogeneous solid from a homogeneous liquid. The challenge to the process engineer is to harness these laws to continuously cast a metal section that is free of cracks, has minimal macrosegregation, and has the desired shape. Confronted with the demands of production, cost containment, and an educationally challenged workforce, the obstacles are very real. One response to the challenge is to move knowledge to the shop floor, where wealth is created, through expert systems to educate the workforce and through artificial intelligence to make the continuous casting process “smart.” Harnessing knowledge for wealth creation, and profitability, is the real challenge. The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering. Dr. J. Keith Brimacombe delivered the 1996 Edward DeMille Campbell Memorial Lecture at the ASM-TMS Meeting in Cincinnati, OH. The written lecture was nearly complete at the time of his untimely passing on December 16, 1997 and has been finished and submitted by his colleague, Professor I.V. Samarasekera. On October 1, 1997, J. Keith Brimacombe was appointed the first President and Chief Executive Officer of the Canada Foundation for Innovation. This enterprise, newly established by the Federal Government of Canada, was provided with one billion dollars of funding with the objective of strengthening the nation’s research infrastructure in universities and hospitals. Sadly, Dr. Brimacombe was able to serve only 3 months of his term and succumbed to a massive heart attack on December 16, 1997, at the age of 54. Dr. Brimacombe held the Alcan Chair in Materials Process Engineering, The Centre for Metallurgical Process Engineering at the University of British Columbia, prior to his appointment with the Canada Foundation for Innovation. He was born in Nova Scotia, raised in Alberta, and received his undergraduate education at UBC, obtaining a B.A.Sc. (Hons.) in 1966. With the support of a Commonwealth Fellowship, he traveled to England and studied under one of the great metallurgical thermochemists of this century, F.D. Richardson, F.R.S., at Imperial College of Science and Technology in the University of London, where he received a Ph.D. in 1970. Subsequently, he was awarded the D.Sc. (Eng.) in 1986 by the University of London and an Honorary Doctorate of Engineering degree in 1994 by the Colorado School of Mines. He returned to the University of British Columbia in 1970 to establish courses and a research program in metallurgical process engineering. He remained at UBC, achieving the rank of Professor in 1979, Stelco Professor of Process Metallurgy (a chair endowed by Stelco) in 1980, Stelco/NSERC Professor (a chair endowed by Stelco and NSERC) in 1985, and the Alcan Chair in 1992. One of the finest metallurgical engineers on the world stage in this century, Dr. Brimacombe pioneered the application of mathematical models and industrial and laboratory measurements, to shed light on complex metallurgical processes spanning both the ferrous and nonferrous industries during his 27 year career at the University of British Columbia. For his groundbreaking research, he earned the reputation of being one of the most innovative intellectual giants in the field, for which he earned global recognition. During his tenure at UBC, he built a large collaborative research group in metallurgical process engineering consisting of about 70 faculty, graduate students, research engineers, and technicians. Much of the research was conducted in close collaboration with Canadian companies such as Stelco, Hatch Associates, Algoma Steel, Western Canada Steel, Sidbec-Dosco, Ivaco, Cominco, Noranda, Inco, Alcan, Domtar, Canadian Liquid Air, and Liquid Carbonic. The thrust of the research was the development and improvement of metallurgical processes, such as continuous casting of steel, flash smelting of lead and copper converting, rotary kilns, and micro-structural engineering of steel and aluminum, and DC casting processes. This body of work led to 300 publications and nine patents as well as two books. In 1985, in cooperation with faculty colleagues, he founded the Centre for Metallurgical Process Engineering at UBC and was named its Director. The purpose of the Centre is to strengthen the interdisciplinary approach to metallurgical process research and to broaden the field of application to materials other than metals. For this body of research, he was awarded the B.C. Science and Engineering Gold Medal (1985) and the Ernest C. Manning Prize (1987) and, before that, the E.W.R. Steacie Memorial Fellowship (1979) from NSERC. He also received the following awards: TMS-AIME Charles Herty Award (1973 and 1987), AMS Marcus A. Grossmann Award (1976), TMS Extractive Metallurgy Science Award (1979, 1987, and 1989), ISS John Chipman Award (1979, 1985, and 1996), TMS Champion H. Mathewson Gold Medal (1980), ISS Robert Woolston Hunt Silver Medal (1980, 1983, and 1993), ASM Henry Marion Howe Medal (1980 and 1985), TMS Extractive Metallurgy Technology Award (1983 and 1991), the Williams Prize of the Metals Society (UK) (1983), the ISS Mechanical Working and Steel Processing Conference Meritorious Award (1986 and 1996), the ASM Canadian Council Lectureship (1986), and the CIM Metallurgical Society Alcan Award (1988). In 1981, he delivered the Arnold Markey Lecture to the Steel Bar Mill Association. In 1987, he was made a Distinguished Member of the Iron and Steel Society and a Fellow of the Royal Society of Canada. In 1988, he became a Fellow of the CIM and, in 1989, he delivered the TMS Extractive Metallurgy Lecture while being awarded Fellowship in TMS. Also in 1989, he was awarded the Izaak Walton Killam Prize for Engineering by the Canada Council, joined the Board of Directors of Sherritt Gordon Ltd., received the Bell Canada Corporate-Higher Education Award and was appointed an Officer of the Order of Canada. In 1990, he received the Meritorious Achievement Award of the Association of Professional Engineers of British Columbia and a UBC Killam Research Prize. In 1992, he was honored with the Commemorative Medal for the 125th Anniversary of Canadian Confederation and, in 1993, delivered the Howe Memorial Lecture of the Iron and Steel Society and became Fellow of the Canadian Academy of Engineering. In 1994, he presented the D.K.C. MacDonald Memorial Lecture; and in 1995, he was the Inland Steel Lecturer at Northwestern University and received the Ablett Prize of the Institute of Materials. In 1996, he delivered the ASM Edward DeMille Campbell Memorial Lecture and, in 1997, received the AIME Distinguished Service, and he was elected a Foreign Associate of the National Academy of Engineering. In June 1997, he received Canada’s highest scientific honor, the Canada Gold Medal in Science and Engineering from the Natural Sciences and Engineering Research Council of Canada. In 1998, Dr. Brimacombe was posthumously awarded the Benjamin Fairless Award by the AIME and the Inco Medal by the CIM at their centennlal celebration. Beyond the quest to generate knowledge and train young people, he was driven by the desire to see the fruits of his research implemented in industry. Not satisfied that publications in peer-reviewed journals are an effective means of reaching out to the shop floor, where knowledge implementation creates wealth, he worked tirelessly at the University-Industry interface to make the transfer of knowledge to industry a reality. A gifted speaker, he was renowned for his ability to translate complex research results to changes that are required to the process for improved quality and/or productivity. Thus, he was sought after by the global metallurgical industry and presented over 50 courses in companies in every continent. A course on continuous casting of steel offered annually in Vancouver, under his directorship, attracted participants from around the world. He seized the opportunities provided by the revolution in computer technology to help further the transfer of knowledge, and since the early 1980s drove the development of user-friendly mathematical models as a means of transferring research results to industry. Brimacombe was also instrumental in developing “smart” systems for the transfer of knowledge and spearheaded the development of an expert system for diagnosing defects in steel billets, which is being marketed commercially. A recent project involving Canadian companies is the development of a “Smart Process,” in which knowledge is made to work in the process through the use of an on-line expert system and sensors. He gave unreservedly of his time to professional societies, which are a vehicle for knowledge transfer and professional development of materials engineers. He was the only professional who was President of the three major societies serving materials engineers in North America: TMS-CIM in Canada in 1985, TMS-AIME in 1993, and ISS-AIME in 1995. His enthusiasm for professional societies was infectious and has led to the initiation of a very dynamic student chapter at UBC. He served on the Killam Research Fellowships Committee of the Canada Council from 1982 to 1985, where he initiated the Killam Prize in Engineering and worked on other committees of the Canadian Council of Professional Engineers, the Science Council of British Columbia, and the Canadian Steel Industry Research Association. He served on the Boards of the ISS and TMS in the United States. He served on numerous committees in these societies, including Joint Commission and Board of Review of Metallurgical Transactions, Book Publishing Committee, Awards Committee, Extractive Metallurgy Sub-committee, Nominating Committee, and Long Range Planning Committee. In 1989, he assumed responsibilities as Founding Chairman of the TMS Extraction and Processing Division, in 1993–4 was TMS President, and in 1994–5 was Founding President of the TMS Foundation. In 1990, he was named as an Eminent Scientist to the Board of Directors of the Ontario Centre for Materials Research. In 1995, he was Chairman of the Science Policy Committee of the Royal Society of Canada and was a member of the National Materials Advisory Board (united States). In 1996, he was elected Vice President of the Academy of Science of the Royal Society of Canada and was appointed to the Board of the United Engineering Trust. He served on the Board of Trustees of the AIME since 1993; had he lived, he would have become President of the AIME in 1999.     

The challenge of quality in continuous casting processes

As in any process, the laws of nature are at work in the continuous casting of metals. Heat spills down temperature gradients under the watchful eye of Fourier, while molten metal moves in response to inertial and body forces governed by the Navier-Stokes equations. Tensile strains develop in the solidifying shell subject to changing cooling conditions, the constitutive behavior of the metal, compatibility, and the Prandtl-Reuss relations. Solutes segregate as thermodynamics compete with diffusion to create a heterogeneous solid from a homogeneous liquid. The challenge to the process engineer is to harness these laws to continuously cast a metal section that is free of cracks, has minimal macrosegregation, and has the desired shape. Confronted with the demands of production, cost containment, and an educationally challenged workforce, the obstacles are very real. One response to the challenge is to move knowledge to the shop floor, where wealth is created, through expert systems to educate the workforce and through artificial intelligence to make the continuous casting process “smart.” Harnessing knowledge for wealth creation, and profitability, is the real challenge. The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering. Dr. J. Keith Brimacombe delivered the 1996 Edward DeMille Campbell Memorial Lecture at the ASM-TMS Meeting in Cincinnati, OH. The written lecture was nearly complete at the time of his untimely passing on December 16, 1997 and has been finished and submitted by his colleague, Professor I.V. Samarasekera. On October 1, 1997, J. Keith Brimacombe was appointed the first President and Chief Executive Officer of the Canada Foundation for Innovation. This enterprise, newly established by the Federal Government of Canada, was provided with one billion dollars of funding with the objective of strengthening the nation’s research infrastructure in universities and hospitals. Sadly, Dr. Brimacombe was able to serve only 3 months of his term and succumbed to a massive heart attack on December 16, 1997, at the age of 54. Dr. Brimacombe held the Alcan Chair in Materials Process Engineering, The Centre for Metallurgical Process Engineering at the University of British Columbia, prior to his appointment with the Canada Foundation for Innovation. He was born in Nova Scotia, raised in Alberta, and received his undergraduate education at UBC, obtaining a B.A.Sc. (Hons.) in 1966. With the support of a Commonwealth Fellowship, he traveled to England and studied under one of the great metallurgical thermochemists of this century, F.D. Richardson, F.R.S., at Imperial College of Science and Technology in the University of London, where he received a Ph.D. in 1970. Subsequently, he was awarded the D.Sc. (Eng.) in 1986 by the University of London and an Honorary Doctorate of Engineering degree in 1994 by the Colorado School of Mines. He returned to the University of British Columbia in 1970 to establish courses and a research program in metallurgical process engineering. He remained at UBC, achieving the rank of Professor in 1979, Stelco Professor of Process Metallurgy (a chair endowed by Stelco) in 1980, Stelco/NSERC Professor (a chair endowed by Stelco and NSERC) in 1985, and the Alcan Chair in 1992. One of the finest metallurgical engineers on the world stage in this century, Dr. Brimacombe pioneered the application of mathematical models and industrial and laboratory measurements, to shed light on complex metallurgical processes spanning both the ferrous and nonferrous industries during his 27 year career at the University of British Columbia. For his groundbreaking research, he earned the reputation of being one of the most innovative intellectual grants in the field, for which he earned global recognition. During his tenure at UBC, he built a large collaborative research group in metallurgical process engineering consisting of about 70 faculty, graduate students, research engineers, and technicians. Much of the research was conducted in close collaboration with Canadian companies such as Stelco, Hatch Associates, Algoma Steel, Western Canada Steel, Sidbec-Dosco, Ivaco, Cominco. Noranda, Inco, Alcan, Domtar, Canadian Liquid Air, and Liquid Carbonic. The thrust of the research was the development and improvement of metallurgical processes, such as continuous casting of steel, flash smelting of lead and copper converting, rotary kilns, and microstructural engineering of steel and aluminum, and DC casting processes. This body of work led to 300 publications and nine patents as well as two books. In 1985, in cooperation with faculty colleagues, he founded the Centre for Metallurgical Process Engineering at UBC and was named its Director. The purpose of the Centre is to strengthen the interdisciplinary approach to metallurgical process research and to broaden the field of application to materials other than metals. For this body of research, he was awarded the B.C. Science and Engineering Gold Medal (1985) and the Ernest C. Manning Prize (1987) and, before that, the E.W.R. Steacie Memorial Fellowship (1979) from NSERC. He also received the following awards: TMS-AIME Charles Herty Award (1973 and 1987). AMS Marcus A. Grossmann Award (1976), TMS Extractive Metallurgy Science Award (1979, 1987, and 1989), ISS John Chipman Award (1979, 1985, and 1996), TMS Champion H. Mathewson Gold Medal (1980), ISS Robert Woolston Hunt Silver Medal (1980, 1983, and 1993), ASM Henry Marion Howe Medal (1980 and 1985), TMS Extractive Metallurgy Technology Award (1983 and 1991), the Williams Prize of the Metals Society (UK) (1983), the ISS Mechanical Working and Steel Processing Conference Meritorious Award (1986 and 1996), the ASM Canadian Council Lectureship (1986), and the CIM Metallurgical Society Alcan Award (1988). In 1981, he delivered the Arnold Markey Lecture to the Steel Bar Mill Association. In 1987, he was made a Distinguished Member of the Iron and Steel Society and a Fellow of the Royal Society of Canada. In 1988, he became a Fellow of the CIM and, in 1989, he delivered the TMS Extractive Metallurgy Lecture while being awarded Fellowship in TMS. Also in 1989, he was awarded the Izaak Walton Killam Prize for Engineering by the Canada Council, joined the Board of Directors of Sherritt Gordon Ltd., received the Bell Canada Corporate Higher Education Award and was appointed an Officer of the Order of Canada. In 1990, he received the Meritorious Achievement Award of the Association of Professional Engineers of British Columbia and a UBC Killam Research Prize. In 1992, he was honored with the Commemorative Medal for the 125th Anniversary of Canadian Confederation and, in 1993, delivered the Howe Memorial Lecture of the Iron and Steel Society and became Fellow of the Canadian Academy of Engineering. In 1994, he presented the D.K.C. MacDonald Memorial Lecture; and in 1995, he was the Inland Steel Lecturer at Northwestern University and received the Ablett Prize of the Institute of Materials. In 1996, he delivered the ASM Edward DeMille Campbell Memorial Lecture and, in 1997, received the AIME Distinguished Service, and he was elected a Foreign Associate of the National Academy of Engineering. In June 1997, he received Canada’s highest scientific honor, the Canada Gold Medal in Science and Engineering from the Natural Sciences and Engineering Research Council of Canada. In 1998, Dr. Brimacombe was posthumously awarded the Benjamin Fairless Award by the AIME and the Inco Medal by the CIM at their centennial celebration. Beyond the quest to generate knowledge and train young people, he was driven by the desire to see the fruits of his research implemented in industry. Not satisfied that publications in peer-reviewed journals are an effective means of reaching out to the shop floor, where knowledge implementation creates wealth, he worked tirelessly at the University-Industry interface to make the transfer of knowledge to industry a reality. A gifted speaker, he was renowned for his ability to translate complex research results to changes that are required to the process for improved quality and or productivity. Thus, he was sought after by the global metallurgical industry and presented over 50 courses in companies in every continent. A course on continuous casting of steel offered annually in Vancouver, under his directorship, attracted participants from around the world. He seized the opportunities provided by the revolution in computer technology to help further the transfer of knowledge, and since the early 1980s drove the development of user-friendly mathematical models as a means of transferring research results to industry. Brimacombe was also instrumental in developing “smart” systems for the transfer of knowledge and spearheaded the development of an expert system for diagnosing defects in steel billets, which is being marketed commercially. A recent project involving Canadian companies is the development of a “Smart Process,” in which knowledge is made to work in the process through the use of an on-line expert system and sensors. He gave unreservedly of his time to professional societies, which are a vehicle for knowledge transfer and professional development of materials engineers. He was the only professional who was President of the three major societies serving materials engineers in North America: TMS-CIM in Canada in 1985, TMS-AIME in 1993, and ISS-AIME in 1995. His enthusiasm for professional societies was infectious and has led to the initiation of a very dynamic student chapter at UBC. He served on the Killam Research Fellowships Committee of the Canada Council from 1982 to 1985, where he initiated the Killam Prize in Engineering and worked on other committees of the Canadian Council of Professional Engineers, the Science Council of British Columbia, and the Canadian Steel Industry Research Association. He served on the Boards of the ISS and TMS in the United States. He served on numerous committees in these societies, including Joint Commission and Board of Review of Metallurgical Transactions, Book Publishing Committee, Awards Committee, Extractive Metallurgy Sub-committee, Nominating Committee, and Long Range Planning Committee. In 1989, he assumed responsibilities as Founding Chairman of the TMS Extraction and Processing Division, in 1993–4 was TMS President, and in 1994–5 was Founding President of the TMS Foundation. In 1990, he was named as an Eminent Scientist to the Board of Directors of the Ontario Centre for Materials Research. In 1995, he was Chairman of the Science Policy Committee of the Royal Society of Canada and was a member of the National Materials Advisory Board (United States). In 1996, he was elected Vice President of the Academy of Science of the Royal Society of Canada and was appointed to the Board of the United Engineering Trust. He served on the Board of Trustees of the AIME since 1993; had he lived, he would have become President of the AIME in 1999.     

Of Perspectives,Issues, and Politics in Materials Technology

Recognizing the pervasive importance of materials science and engineering (MSE) to practically every facet of man’s life, this lecture takes a broad view of the origin and technical trends and achievements in MSE, briefly reviewing its history and relationship to society over many millennia, to the present day, with specific examples. Major emphasis, however, is placed on modern MSE as related to current national issues, using as illustrations of the latter natural resources, industry and the economy, research and development, education, and technology transfer. The discussion of these areas leads to consideration of the role of the Federal Government and the importance of and need for a coherent national policy to deal with critical issues, many of which are listed herein. Some important steps by the Government fostering high level coordination as well as cooperation among government, industry, and academe are cited. Having thus illustrated the pervasive and vital impact of MSE on society, and its current esteemed recognition and position of influence, the lecture concludes that in this period of global change — social, economic, and technological — there is a challenge to MSE to respond beneficially to societal needs more than ever before. The opportunity and mechanisms now exist. Greater participation in the public and political arenas, with mutual education, is indicated. NATHAN E. PROMISEL received his Bachelor of Science and Master of Science Degree at the Massachusetts Institute of Technology, did his doctorate work at Yale University, and received an Honorary Doctor of Engineering Degree at Michigan Technological University. He became Assistant Lab Director at International Silver Company, leaving in 1940, and Chief Materials Scientist and Engineer (aeronautics and weapons) and Materials Research Coordinator for the Department of the Navy, leaving in 1966. He is presently an International Consultant. Dr. Promisel has been a long-time member of the National Materials Advisory Board of the National Academies of Science and Engineering, and from 1966 to 1974 was its Executive Director. He was also a Member of the Office of Technology Assessment (Congress) Materials Advisory Committee, as well as Chairman or Member of numerous other Government and public technical groups. These included being Chairman of the U.S. Group for the Science Exchange Program with the U.S.S.R., for materials and electrometallurgy, and serving as Chairman of the NATO Aerospace Research Group (Materials and Structures). Dr. Promisel is a member of the National Academy of Engineering; Past President, Fellow, and Honorary Member, American Society for Metals; Past President and Founding Member of the Federation of Materials Societies; Honorary Member of AIME, ASTM, and SAE (Materials Division); Fellow of British Institute of Metals and SAMPE. He has presented distinguished lectures to The Electrochemical Society and ASTM. Dr. Promisel has received numerous awards and is the holder of two patents. He has written 65 technical papers and has been the author, contributor, or editor of eight books.     

Mechanical properties of thin films

The mechanical properties of thin films on substrates are described and studied. It is shown that very large stresses may be present in the thin films that comprise integrated circuits and magnetic disks and that these stresses can cause deformation and fracture to occur. It is argued that the approaches that have proven useful in the study of bulk structural materials can be used to understand the mechanical behavior of thin film materials. Understanding the mechanical properties of thin films on substrates requires an understanding of the stresses in thin film structures as well as a knowledge of the mechanisms by which thin films deform. The fundamentals of these processes are reviewed. For a crystalline film on a nondeformable substrate, a key problem involves the movement of dislocations in the film. An analysis of this problem provides insight into both the formation of misfit dislocations in epitaxial thin films and the high strengths of thin metal films on substrates. It is demonstrated that the kinetics of dislocation motion at high temperatures are expecially important to the understanding of the formation of misfit dislocations in heteroepitaxial structures. The experimental study of mechanical properties of thin films requires the development and use of nontraditional mechanical testing techniques. Some of the techniques that have been developed recently are described. The measurement of substrate curvature by laser scanning is shown to be an effective way of measuring the biaxial stresses in thin films and studying the biaxial deformation properties at elevated temperatures. Submicron indentation testing techniques, which make use of the Nanoindenter, are also reviewed. The mechanical properties that can be studied using this instrument are described, including hardness, elastic modulus, and time-dependent deformation properties. Finally, a new testing technique involving the deflection of microbeam samples of thin film materials made by integrated circuit manufacturing methods is described. It is shown that both elastic and plastic properties of thin film materials can be measured using this technique. The Institute of Metals Lecture was established in 1921, at which time the Institute of Metals Division was the only professional division within the American Institute of Mining and Metallurgical Engineers Society. It has been given annually since 1922 by distinguished men from this country and abroad. Beginning in 1973 and thereafter, the person selected to deliver the lecture will be known as the “Institute of Metals Division Lecturer and R.F. Mehl Medalist” for that year. WILLIAM D. NIX, Professor, obtained his B.S. degree in Metallurgical Engineering from San Jose State University, San Jose, CA, and his M.S. and Ph.D. degrees in Metallurgical Engineering and Materials Science, respectively, from Stanford University, Stanford, CA. He joined the faculty at Stanford in 1963 and was appointed Professor in 1972. In 1964, Professor Nix received the Western Electric Fund Award for Excellence in Engineering Instruction and, in 1970, the Bradley Stoughton Teaching Award of ASM. He received the 1979 Champion Herbert Mathewson Award and, in 1988, was the Institute of Metals Lecturer and recipient of the Robert Franklin Mehl Award of TMS-AIME. He was elected Fellow of the American Society for Metals in 1978 and elected Fellow of TMS-AIME in 1988. He also received a Distinguished Alumnus Award from San Jose State University in 1980, and he served as Chairman of the 1985 Gordon Conference on Physical Metallurgy. In 1987, he was elected to the National Academy of Engineering. In 1966, he participated in the Ford Foundation's “Residence in Engineering Practice” program as Assistant to the Director of Technology at the Stellite Division of Union Carbide Corporation. From 1968 to 1970, Professor Nix was Director of Stanford's Center for Materials Research. Professor Nix is engaged in research on the mechanical properties of solids. He is principally concerned with the relation between structure and mechanical properties of materials in both thin film and bulk form. He is coauthor of about 190 publications in these and related fields. Professor Nix teaches courses on dislocation theory and mechanical properties of materials. He is coauthor of “The Principles of Engineering Materials,” published in 1973 by Prentice-Hall, Incorporated, Englewood Cliffs, NJ.     

Emerging technologies in extraction and processing of metals

The growing need to conserve energy and materials and prevent environmental pollution led to an increased demand for better understanding of potential as well as existing processes. In this context, thermodynamic and transport modeling of materials and processes provides a rapid and cost-effective means of conducting and minimizing the complexity of experimental investigations and developing innovative and environmentally friendly metallurgical processes. This presentation concentrates on some fundamentals on new technologies as extractive metallurgy of copper, lead, aluminum, and other nonferrous metals and processing of nanocomposites. The newer routes of copper smelting and modeling of impurities in copper and lead slags and mattes are reviewed. The copper smelting capacity increased by a factor of 10 during the last three decades, the smelting rate increased by a factor of 6, and the process fuel equivalent decreased by a factor of 2. The a priori prediction, with no adjustable parameters, of impurity capacities of S and As in copper slags and S in lead slags, based on the Reddy-Blander model, is reviewed. Excellent agreement between the model-predicted capacities data and laboratory experimental and industrial data was observed. The model is an invaluable tool for optimization of process parameters in the efficient removal of impurities from the nonferrous-metals smelting and refining processes. A new in-situ processing technology for the production of a lightweight alloy matrix with ceramic particle reinforcements such as SiC in aluminum alloy matrix composites by bubbling reactive gas is reviewed. Thermal plasma processing of a nanoscale aluminum alloy matrix with TiC and TiN composites is discussed. The in-situ formed reinforcements are thermodynamically stable, and the composite particles are of uniform size. The optimum process parameters for the production of composite powders by thermal plasma are discussed. A low-temperature aluminum production and refining process using ionic liquids as electrolytes is reviewed. This newly developed aluminum production process has many advantages over the current industrial process, and the energy consumption is closer to the thermodynamic limit of aluminum production. The Extraction and Processing Lecturer Award honors an outstanding scientific leader in the field of nonferrous extractive metallurgy with an invitation to present a comprehensive lecture at the TMS Annual Meeting. Dr. R.G. Reddy is an ACIPCO Chair Professor of Metallurgical and Materials Engineering; Adjunct Professor of Chemical Engineering; and Associate Director of Center for Green Manufacturing at The University of Alabama (Tuscaloosa, AL). His academic and research work experiences include: Professor and Chairman of the Department of Chemical and Metallurgical Engineering at University of Nevada, Reno; Visiting Researcher at Lawrence Berkeley Laboratory, Berkeley; Indian Institute of Technology, Bombay; and Argonne National Laboratory, Chicago. Professor Reddy has 20 years of teaching and research experience in the field of chemical and materials engineering. He obtained his Ph.D. degree from the University of Utah. He has conducted projects involving thermodynamics and kinetics of metallurgical reactions; pyrometallurgy, hydrometallurgy, plasma processing of metals, molten salt electrolysis, and waste processing. He has published over 174 research articles in national and international journals and 7 books, including one undergraduate student textbook in thermodynamics. He has presented numerous invited lectures and research presentations in the United States and abroad. As an Endowed Chair Professor in the college of engineering and a major professor and supervisor, he advised and worked with over 60 research scholars, students, and visiting scientists. Recently, his alma mater, the University of Utah, recognized Dr. Reddy as a John Lewis Distinguished Lecturer of the year. Dr. Reddy has served in many leadership positions within the College of Engineering, the University, and other national and international organizations. He currently chairs the Extraction and Processing committee for TMS, and the Phase-equilibria committee of ASM. In SME, Dr. Reddy serves on the Pyrometallurgy committee (past chair) and Education committee (past chair). He was appointed as the University of Alabama Coordinator for the National Space Science and Technology Center (NSSTC) and NASA, and Council Member for the Alabama State Committee for Department of Defense-EPSCoR programs. He has received the “Service Award” from TMS Light Metals. Dr. Reddy has received a Research Award from the J. Manufacturing Society and a Best Research Paper—Recycling Award from the Light Metals Division, TMS. He is also a Fellow of ASM International.     

Interfacial deformation mechanisms in hexagonal-close-packed metals

Deformation processes involving interfacial dislocation mechanisms in twin boundaries of hexagonal-close-packed (hcp) metals are described. The topological properties of individual defects, namely their Burgers vectors, b, and step heights, h, are defined rigorously, and the magnitude of the diffusional flux of material required for motion of a defect along an interface is expressed quantitatively in terms of b, h, and the material’s density. This framework enables interactions between defects to be treated and, in particular, enables identification of processes that are conservative. Using these topological arguments, it is shown that sessile interfacial defects in twins need not block further twinning and that the recently discovered Serra-Bacon (S—B) twinning mechanism is conservative. The possible wider significance of the S—B-type mechanism that causes localized lateral growth of twins is also considered briefly in the context of the deformation of hcp and martensitic materials. This article is based on a presentation made in the symposium entitled “Defect Properties and mechanical Behavior of HCP Metals and Alloys” at the TMS Annual Meeting, February 11–15, 2001, in New Orleans, Lousiana, under the auspices of the following ASM committees: Materials Science Critical Technology Sector, Structural Materials Division, Electronic, Magnetic & Photonic Materials Division, Chemistry & Physics of Materials Committee, Joint Nuclear Materials Committee, and Titanium Committee.     

The interdisciplinary nature of hydrometallurgy

Hydrometallurgical extraction of metals is an important widely practiced technology in the metallurgical industry for treating both primary and secondary resources of valuable metals. Successful hydrometallurgical approaches to metal extraction require a full understanding of a wide spectrum of scientific and engineering principles in many disciplines. These include solution chemistry, electrochemistry, thermodynamics, kinetics, transport processes, and, frequently, biology. In this article, intricate relationships among various disciplines influencing hydrometallurgical extraction are reviewed and analyzed with pertinent examples. The effect of operating parameters on the overall extraction strategy are examined and discussed. The Extraction and Processing Lecturer Award honors an outstanding scientific leader in the field of nonferrous extractive metallurgy with an invitation to present a comprehensive lecture at the TMS Annual Meeting. Kenneth N. Han is the Regents Distinguished Professor and Douglas W. Fuerstenau Professor in the Department of Materials & Metallurgical Engineering at the South Dakota School of Mines and Technology (SDSM&T). He obtained his B.S. and M.S. degrees from Seoul National University (SNU), an M.S. from the University of Illinois, and a Ph.D. from the University of California, Berkeley. He was with the Department of Chemical Engineering, Monash University (Melbourne, Australia) from 1971 to 1980. In 1981, he joined SDSM&T. He was head of the Department of Metallurgical Engineering from 1987 to 1994 and dean of the College of Materials Science and Engineering from 1994 to 1999. His research interests include hydrometallurgy, interfacial phenomena, metallurgical kinetics, solution chemistry, fine particle recovery, and electrometallurgy. He has directed over 70 graduate students and postdoctorate researchers, published more than 150 papers in national and international journals, and presented more than 100 papers at international conferences. He is an author of ten monographs and holds eight patents in the area of extractive metallurgy. In 1987, he received the Presidential Professor Award from SDSM&T. In 1994, he received the Ernest L. Buckley Award, a South Dakota State Governor’s Award, for his industrial research efforts. He received the Milton E. Wadsworth Award and the Arthur F. Taggart Award from the Society of Mining, Metallurgical and Exploration in 1995. In 1997, he received the Distinguished Alumni Award from the College of Engineering of SNU. He became an SME Distinguished Member in 1998. In 1998, he was awarded the Excellence in Research by the SD Board of Regents. In 2000, he received the AIME Mineral Industry Education Award, and, in 2002, the Robert H. Richards Award from AIME. In 2003, he received the 2003 Extraction and Processing Distinguished Lecturer Award at the 132 TMS annual meeting in San Diego. He was inducted into the National Academy of Engineering in 1996. He is a foreign member of the National Academy of Engineering of Korea since 1998 and was inducted into the Korea Academy of Science and Technology in 1999.     

Historical account of the contributions of E. C. Bain

This paper attempts to summarize some of Edgar Bain’s inspired contributions to metallurgy during a period of about a decade—surely one of the most intensely creative eras in the history of the profession. It is necessarily subjective and to some extent incomplete, but it hopefully provides a documentation of clear thinking about important practical and theoretical problems and of incisive experimentation to confirm critical hypotheses. H. W. PAXTON, on leave from Carnegie-Mellon University, Pittsburgh, Pa., is Director, Division of Materials Research, National Science Foundation, Washington, D.C.     

Dynamic Effects in Hopkinson Bar Four-Point Bend Fracture

Hopkinson bar techniques have played an important role in the study of high-rate deformation and fracture behavior of materials. In the current work, a split Hopkinson pressure bar was developed for dynamic four-point bend fracture testing, referred to as a “two-bar (incident and transmitted bars)/four-point” (2-bar/4-pt) bend test. To further understand some fundamental issues regarding stress wave propagation in this 2-bar/4-pt bend testing system, dynamic fracture tests were performed in pulse-shaped and unshaped pulse testing conditions. The effect of the pulse shaper on the incident pulse characteristics (rise time and duration), specimen’s dynamic response (load and loading point displacement), crack initiation time and stress-state equilibrium were investigated experimentally in the current work. The present results show that stress state equilibrium can be achieved prior to fracture initiation in notched and precracked specimens. In the pulse-shaped bending test, the specimen is more likely to attain stress-state equilibrium than in an unshaped incident pulse test. The crack initiation time was extended and the time required for attaining stress equilibrium was reduced by pulse shaping due to the tailored incident pulse having a longer rise time, which ensures that stress equilibrium is achieved prior to crack initiation. This article is based on a presentation made in the symposium entitled “Dynamic Behavior of Materials,” which occurred during the TMS Annual Meeting and Exhibition, February 25–March 1, 2007 in Orlando, Florida, under the auspices of The Minerals, Metals and Materials Society, TMS Structural Materials Division, and TMS/ASM Mechanical Behavior of Materials Committee.     

Strength and electrical conductivity of deformation-processed Cu-15 Vol Pct Fe alloys produced by powder metallurgy techniques

Powder metallurgical techniques have been employed to prepare the precursor billets in the preparation of Cu-15 vol pct Fe alloys by deformation processing. It has been demonstrated that by (1) using high-purity gas-atomized Cu powders blended with commercial high-purity Fe powders and (2) controlling the time/temperature processing conditions within specific limits, it is possible to produce Cu-Fe deformation-processed alloys with strength/conductivity properties matching those of Cu-Nb, Cu-Ta, and Cu-Cr alloys. These properties are significantly superior to the best commercial alloys. formerly with the Department of Materials Science and Engineering and Ames Laboratory, Iowa State University This article is based on a presentation made in the symposium “High Performance Copper-Base Materials” as part of the 1991 TMS Annual Meeting, February 17–21, 1991, New Orleans, LA, under the auspices of the TMS Structural Materials Committee.     

Deformation and fracture in martensitic carbon steels tempered at low temperatures

This article reviews the strengthening and fracture mechanisms that operate in carbon and low-alloy carbon steels with martensitic microstructures tempered at low temperatures, between 150 °C and 200 °C. The carbon-dependent strength of low-temperature-tempered (LTT) martensite is shown to be a function of the dynamic strain hardening of the dislocation and transition carbide substructure of martensite crystals. In steels containing up to 0.5 mass pct carbon, fracture occurs by ductile mechanisms of microvoid formation at dispersions of second-phase particles in the matrix of the strain-hardened tempered martensite. Steels containing more than 0.5 mass pct carbon with LTT martensitic microstructures are highly susceptible to brittle intergranular fracture at prior austenite grain boundaries. The mechanisms of the intergranular fracture are discussed, and approaches that have evolved to minimize such fracture and to utilize the high strength of high-carbon hardened steels are described. The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering. Dr. George Krauss is currently University Emeritus Professor at the Colorado School of Mines. He received the B.S. in Metallurgical Engineering from Lehigh University in 1955 and the M.S. and Sc.D. degrees in Metallurgy from the Massachusetts Institute of Technology in 1958 and 1961, respectively, after working at the Superior Tube Company as a Development Engineer in 1956. In 1962–63, he was an NSF Postdoctoral Fellow at the Max-Planck-Institut für Eisenforshung (Düsseldorf, Germany). He served at Lehigh University as Assistant Professor, Associate Professor, and Professor of Metallurgy and Materials Science from 1963 to 1975 and, in 1975, joined the faculty of the Colorado School of Mines as the AMAX Professor of Physical Metallurgy. He was the John Henry Moore Professor of Metallurgical and Materials Engineering at the time of his retirement from the Colorado School of Mines in 1997. In 1984, Dr. Krauss was a principal in the establishment of the Advanced Steel Processing and Products Research Center, an NSF industry-university cooperative research center at the Colorado School of Mines, and served as its first director until 1993. He has authored the book Steels: Heat Treatment and Processing Principles, ASM International, 1990, coauthored the book Tool Steels, Fifth Edition, ASM International, 1998, and edited or coedited several conference volumes on topics including tempering of steel, carburizing, zinc-based coatings on steel, and microalloyed forging steels. He has published over 280 papers and lectured widely at technical conferences, universities, corporations, and ASM chapters, including a number of keynote, invited, and honorary lectures. Dr. Krauss has served as the President of the International Federation of Heat Treatment and Surface Modification, 1989–91, and as President of ASM International, 1996–97. He is a Fellow of ASM International and has received the Adolf Martens Medal of the German Society for Heat Treatment and Materials Technology, the Charles S. Barrett Silver Medal of the Rocky Mountain Chapter ASM, the George Brown Gold Medal of the Colorado School of Mines, and several other professional and teaching awards, including the ASM Albert Easton White Distinguished Teacher Award in 1999. He is an Honorary Member of the Iron and Steel Institute of Japan and a Distinguished Member of the Iron and Steel Society of AIME.     

Deformation and fracture in martensitic carbon steels tempered at low temperatures

This article reviews the strengthening and fracture mechanisms that operate in carbon and low-alloy carbon steels with martensitic microstructures tempered at low temperatures, between 150 °C and 200 °C. The carbon-dependent strength of low-temperature-tempered (LTT) martensite is shown to be a function of the dynamic strain hardening of the dislocation and transition carbide substructure of martensite crystals. In steels containing up to 0.5 mass pct carbon, fracture occurs by ductile mechanisms of microvoid formation at dispersions of second-phase particles in the matrix of the strain-hardened tempered martensite. Steels containing more than 0.5 mass pct carbon with LTT martensitic microstructures are highly susceptible to brittle intergranular fracture at prior austenite grain boundaries. The mechanisms of the intergranular fracture are discussed, and approaches that have evolved to minimize such fracture and to utilize the high strength of high-carbon hardened steels are described. The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering. Dr. George Krauss is currently University Emeritus Professor at the Colorado School of Mines. He received the B.S. in Metallurgical Engineering from Lehigh University in 1955 and the M.S. and Sc.D. degrees in Metallurgy from the Massachusetts Institute of Technology in 1958 and 1961, respectively, after working at the Superior Tube Company as a Development Engineer in 1956. In 1962–63, he was an NSF Postdoctoral Fellow at the Max-Planck-Institut für Eisenforshung (Düsseldorf, Germany). He served at Lehigh University as Assistant Professor, Associate Professor, and Professor of Metallurgy and Materials Science from 1963 to 1975 and, in 1975, joined the faculty of the Colorado School of Mines as the AMAX Professor of Physical Metallurgy. He was the John Henry Moore Professor of Metallurgical and Materials Engineering at the time of his retirement from the Colorado School of Mines in 1997. In 1984, Dr. Krauss was a principal in the establishment of the Advanced Steel Processing and Products Research Center, an NSF industry-university cooperative research center at the Colorado School of Mines, and served as its first director until 1993. He has authored the book Steels: Heat Treatment and Processing Principles, ASM International, 1990, coauthored the book Tool Steels, Fifth Edition, ASM International, 1998, and edited or coedited several conference volumes on topics including tempering of steel, carburizing, zinc-based coatings on steel, and microalloyed forging steels. He has published over 280 papers and lectured widely at technical conferences, universities, corporations, and ASM chapters, including a number of keynote, invited, and honorary lectures. Dr. Krauss has served as the President of the International Federation of Heat Treatment and Surface Modification, 1989–91, and as President of ASM International, 1996–97. He is a Fellow of ASM International and has received the Adolf Martens Medal of the German Society for Heat Treatment and Materials Technology, the Charles S. Barrett Silver Medal of the Rocky Mountain Chapter ASM, the George Brown Gold Medal of the Colorado School of Mines, and several other professional and teaching awards, including the ASM Albert Easton White Distinguished Teacher Award in 1999. He is an Honorary Member of the Iron and Steel Institute of Japan and a Distinguished Member of the Iron and Steel Society of AIME.     

Influence of Microstructure on the Spall Failure of Aluminum Materials

Laser-shock-induced spall failure is studied in thin aluminum targets at strain rates from 2 to 5 × 10⁶ s⁻¹. Targets were prepared from high-purity aluminum in the recrystallized condition and a low-impurity aluminum alloy containing 3 wt pct magnesium in both recrystallized and cold-rolled conditions. The effects of material and microstructure on spall fracture morphology are investigated. Recrystallized pure aluminum produced spall fracture surfaces characterized by transgranular ductile dimpling. Recrystallized aluminum-magnesium alloy with a 50-μm grain size produced less ductile spall surfaces, which were dominated by transgranular fracture, with some isolated transgranular ductile dimpling at fast strain rates. Transgranular ductile dimpling regions disappeared in recrystallized alloy specimens with a 23-μm grain size tested at faster rates. Cold-rolled alloy material produced spall failure surfaces consisting of brittle intergranular and transgranular fractures. Measured spall strength increases with increasing ductile fracture character. Spall failure preferentially follows grain boundaries, making grain size an important factor in spall fracture surface character. This article is based on a presentation made in the symposium entitled “Dynamic Behavior of Materials,” which occurred during the TMS Annual Meeting and Exhibition, February 25–March 1, 2007 in Orlando, Florida, under the auspices of The Minerals, Metals and Materials Society, TMS Structural Materials Division, and TMS/ASM Mechanical Behavior of Materials Committee.

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Study on Macro- and Micromodeling of the Solidification Process of Aluminum Shape Casting

Numerical methods to improve the computational efficiency and to extend the computational scale of the mold filling and solidification of the aluminum die casting process were studied. For molding filling simulation, the parallel computation method was studied, while for solidification simulation, an implicit finite difference scheme and a transient surface layer concept were studied. In addition, the modified cellular automaton method was used to simulate the microstructure formation and evolution of the aluminum alloy, including the grain structure and the dendritic microstructure. The experimental results show that the models in the article are reasonable for describing the formation and evolution of the microstructure formation. This article is based on a presentation made in the symposium entitled “Simulation of Aluminum Shape Casting Processing: From Design to Mechanical Properties,” which occurred March 12–16, 2006 during the TMS Spring Meeting in San Antonio, Texas, under the auspices of the Computational Materials Science and Engineering Committee, the Process Modeling, Analysis and Control Committee, the Solidification Committee, the Mechanical Behavior of Materials Committee, and the Light Metal Division/Aluminum Committee.